ZOMG BEST REDO YET. I'm proud of this one...
Anyway, Roger Lloyd Pack played both Barty Crouch in Harry Potter and the Cyberleader (John Lumic) in Doctor Who.
(David Tennant was Barty Crouch jr, but that doesn't really matter in this comic.)
Original here: [link]More Comics
Read all my Doctor Who comics (including Search for the Truth) in order here [link]
And my other random comics are all here [link]